//////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) 2022, Image Engine Design Inc. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//      * Redistributions of source code must retain the above
//        copyright notice, this list of conditions and the following
//        disclaimer.
//
//      * Redistributions in binary form must reproduce the above
//        copyright notice, this list of conditions and the following
//        disclaimer in the documentation and/or other materials provided with
//        the distribution.
//
//      * Neither the name of John Haddon nor the names of
//        any other contributors to this software may be used to endorse or
//        promote products derived from this software without specific prior
//        written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
//  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
//  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
//  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
//  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
//  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////

#pragma once

#include "GafferUI/Gadget.h"

#include <chrono>
#include <list>

namespace GafferUI
{

class GAFFERUI_API FPSGadget : public Gadget
{

	public :

		explicit FPSGadget( Imath::V3f defaultPosition = Imath::V3f( 5.0f, 50.0f, 0.0f ) );
		~FPSGadget() override;

		GAFFER_GRAPHCOMPONENT_DECLARE_TYPE( GafferUI::FPSGadget, FPSGadgetTypeId, Gadget );

	protected :
		void renderLayer( Layer layer, const Style *style, RenderReason reason ) const override;
		unsigned layerMask() const override;
		Imath::Box3f renderBound() const override;

	private :
		mutable std::list< std::chrono::time_point<std::chrono::high_resolution_clock> > m_timeBuffer;
};

IE_CORE_DECLAREPTR( FPSGadget )

} // namespace GafferUI
